call [rax] suggests to pay attention because the issue could be exploitable if rax is attacker controlled.

We can see the crash happens when we read address near null so you may think it's a non-exploitable null pointer dereference. However to confirm this we need to investigate how rax is set to null. If null is read from previously freed memory we may have the chance to corrupt the memory in a way to inject arbitrary pointer therefore to make the issue exploitable.

We can see the address is fixed, relative to tk85, which was allocated when the module was being loaded in the virtual address space. Now we can say with more confidence the issue is a non-exploitable null pointer dereference.